Twitter has raised $200 million in financing from a deal that values the microblogging company at $3.7 billion, less than a year after it began its first serious efforts to make money.

The investment came from Silicon Valley venture capital firm Kleiner Perkins Caufield & Byers and existing investors, Twitter said.

The money will help Twitter grow the company, Twitter said in a post on its corporate blog yesterday. The blog post did not elaborate and a spokesman declined to offer specifics.

Twitter, which had 175 million users as of September, is among the new crop of quickly growing Internet social networking services. Others include Facebook and Zynga.

The company added two new board members — FlipBoard Chief Executive Mike McCue and DoubleClick CEO David Rosenblatt.

The moves come two months after the four-year-old company handed the job of chief executive to Dick Costolo, the architect of its new advertising efforts.